| Acronym | Meaning |
 | ACT | Atmospheric Chemical Transformations |
| HEAO | High Energy Astronomy Observatory |
| ESSCO | Environmental Science & Services Corporation |
| NOC | Naval Oceanographic Command |
| ICH | Inter-Union Commission On The Lithosphere |
| TID | Traveling Ionospheric Disturbance |
| SAS | Small Astronomy Satellite |
| GRGC | Geologic Record Of Global Change |
| LOTREX | Working LORAN |
| AD&D | Accidental Death And Dismemberment |
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